Air heater



Jan. 2, 1934. I a. E. ASKE 1,941,527

AIR HEATER Filed Jan. 19, 19:51 3 Sheets -She'et 1 v five WW Q1 lrving E. Aske f 5'1 x f 5s :2 159 W Jan. 2, 1934. I. E. ASKE 1,941,527

AIR HEATER Filed' Jan. 19, 1'93]. 3 Sheets-Sheet 2 gwwmto o Irving E. Aske 2, .1934. L E ASK 1,941,527

AIR HEATER Filed Jan. 19, 1931 5 Sheets-Sheet 3 Fig. 5

gwmmtw F g 6 I Irving E. Ake

Patented Jan. 2, 1934 UNITED STATES PATENT OFFICE My invention relates to air heaters and particularly to air heaters adapted tobe used for heating motor vehicles.

An object of the invention resides in providing a heater which may be equally as well operated either from the exhaust gas of the vehicle engine or from the cooling fluid thereof.

Another object of the invention resides in providing a heater having positive means for impelling the flow of air through the heater and in which the air may be directed in any desired direction within a given plane. I

A still further object of the invention resides in providing a heater which will be extremely l5 compactand which may be installed within the cab of the vehicle without occupying useful space and without interfering with the comfort of the occupants.

An object of the invention resides in providing a heater which may be constructed principally from metal stampings and at an economical cost.

' Another object of the invention resides in providing a highly durable heater which will be extremely rigid and substantial in construction and which will not easily get out of order.

An object of the invention resides in providing a heater comprising a radiator structure having two passageways extending at right angles to one another, and in providing means for impelling flow of air therethrough.

Another object of the invention resides in forming the inlet and the outlet of said passageways so that the air leaves the heater in a direction at right angles to the direction of the incoming air.

Another object of the invention resides in employing a toroidal radiator having a central compartment and in disposing a motor for operating the means for impelling the flow of air within said compartment.

Anobject of the invention resides in spacing the motor from the radiator to provide an inner annular space therebetween serving as one of the 15 air passageways.

Another object of the invention resides in providing a shell encasing the radiator, said shell being formed with a sleeve and a back spaced from the radiator to provide an outer annular passageway and a radial passageway, communieating therewith and with said inner annular passageway.

A still further object of the invention resides in attaching to the radiator structure, a bell having a central opening. surrounded by an Outwardly extending flange, said opening communieating with the irmer annular passageway.

An object of the invention resides in providing a blower for impelling the flow of air through the radiator structure having a case formed with an inlet adapted to receive said flange and formed with a lip encircling said inlet and engaging said flange for supporting the blower case thereon and to permit of rotating the blower case to cause the discharge of air therefrom in any desired direction.

Another object of the invention resides in providing the back of the shell with a central opening adapted to receive one of the bearings of the motor for supporting one end thereof.

A still further object of the invention resides in providing the body of the motor at the other endthereof with legs adapted to be attached to other portions of the radiator structure.

A feature of the invention resides in providing the radiator with heating fluid circulating passageways and in further providing spaced inlet and outlet pipes communicating therewith.

An object of the invention consists in extending the said pipes through the radiator shell and in providing sleeves on said shell encircling said pipes for relieving the strain thereon.

Another object of the invention resides in providing a tie member for connecting said sleeves for stiffening and reinforcing said sleeves and 5 pipes.

A feature of the invention resides in constructing said tie member. with legs adapted to engage the back of the shell for holding the tie member spaced therefrom and in further providing means upon said sleeves adapted to urge the tie member toward the shell.

An object of the invention resides in construct-' ing the device so that the blower and motor may be readily removed therefrom without dismount- 96 ing the entire heater.

Another object of the invention resides in constructing the one of the embodiments thereof with a toroidal radiator core having longitudinally extending tubes providing radial air pas- 100 sageways and with toroidal fluid headers communicating with said tubes, one of said chamhers-having an inlet pipe connected therewith and the other of said headers having an outlet pipe connected therewith.

Other objects of the invention reside in the novel combination and arrangement of partsand in the details of construction hereinafter illustrated and/or described.

In the drawings:

Fig. 1 is a front elevational view of a heater with a portion thereof cut away and illustrating an embodiment of my invention.

Fig. 2 is a longitudinal sectional view taken on line 2-2 of Fig. 1 and drawn to a somewhat 7 larger scale.

Fig. 3 is a rear view of the structure shown in Figs. 1 and 2.

Fig. 4 is a fragmentary sectional view' of a portion of a modified structure taken on line 44 of Fig. 3 and drawn to the same scale as Fig. 1 and showing another method of mounting the heater.

Fig. 5 is an elevational view of a modification of the invention.

Fig. 6 is a longitudinal sectional view taken on line 6-6 of Fig. 5 and drawn to a somewhat larger scale.

The majority of heaters for motor vehicles which have been previously devised and which employ an electric motor for circulating the air to be heated, occupy a relatively large amount of space so that when installed within the cab of an ordinary motor vehicle, such devices are in the way of the occupants and frequently reduce the available leg room. At the same time when such devices are installed in a particular locality in the vehicle, it becomes impossible to direct the heated air to the various portions of the vehicle. The present invention overcomes these difliculties by providing a heater which is extremely compact and which may be, if desired, installed in such a manner as to not readily interfere with the comfort of the occupant, and from which the air may be discharged in any desired direction within a given plane.

In the form of the invention shown in Figs. 1 to 4 inclusive, a radiator structure is employed which I have indicated in its entirety at A. This radiator structure comprises a radiator 10 which is encased within a shell 11 and supported thereby. The radiator 10 is preferably toroidal in shape to provide a central compartment 12 within the same. In this compartment is' situated an electric motor 13, which is adapted to operate means designated at 14 for impelling the fiow of air along the heating surfaces of the radiator 10. These various parts will now be described in detail:

The radiator 10 as stated is constructed in the form of a tore and with a single chamber 15 therein as best shown in Fig. 2. This radiator, may if desired, be constructed of sheet metal as illustrated, and when so formed is constructed with three parts, 16, 17 and 18. The part 16 comprises a cylindrical portion 19, forming the outer wall of the radiator and a radial portion 20 connected therewith. The radial portion. 20 is annular in shape and the inner edge 21 thereof is turned inwardly and parallel to the cylindrical portion 19. The portion 18 is cylindrical and forms the inner wall of the radiator. This portion is preferably soldered to the edge 21 of the portion 16 to effect a tight joint therebetween. The portion 17 is similar to the portion 20 being radially disposed and is annular in construction with its two circular edges turned inwardly as designated at 22 and 23 to fit in between the two cylindrical walls 18 and 19 of the radiator. This portion of the radiator is soldered or welded to the walls 18 and 19 so that the entire structure forms a unitary hollow ring, having the single chamber 15 within the same.

The shell 11 is preferably constructed as a stamping and-consists of a back 24 having a sleeve 25, struck outwardly therefrom. This sleeve 25 terminates in a radial flange 26, by means of which the device may be attached to any suitable support as for example, the dash board 27 of the motor vehicle. For this purpose a hole 140, the size of the sleeve 25 is cut in the dash board 27 and the heater attached to'the dash board, through bolts 28, which pass jointly therethrough and through the flange 26.

The radiator 10 is installed within the shell 11 and is attached thereto as shown in detail in Fig. 4. For this purpose, four bolts, 29, 30, 31 and 32 are welded or soldered to the radiator 10, along the wall 20 thereof with the heads 33 of said bolts extending within the radiator proper and with the shanks 34 thereof protruding outwardly therefrom. These bolts pass through openings 35 in the back 24 of shell 11. Spacer washers 36 mounted on the shanks 34 of these bolts and disposed between the wall 20. of radiator 10 and the back 10 of shell 11 hold the radiator spaced from the rear wall of the shell, to provide a radial passageway 38 between said wall 20 and the back 24. The radiator is clamped in position and held attached to the shell 11 through nuts 39, which are screwed upon the threaded ends of the shanks 34 of the bolts 29, 30, 31 and 32 and which clamp the parts firmly in place. The shell 11 is of such a diameter and the openings 35 are so situated that the wall 16 of radiator 17 is centrally disposed with respect to the shell and is spaced from the sleeve 25 to provide an annular passageway 3'7 between said radiator and shell and communicating with the passageway 38.

Heating fluid is conducted to the chamber 15 within the radiator 10, through an inlet pipe 40 situated at the upper part of the radiator and is conducted from said radiator through an outlet pipe 41 situated at-the lowermost portion of the radiator. The two pipes 40 and 41 are attached to the wall 20 of the radiator and are preferably welded or soldered to said radiator wall, to form a fiuid tight connection therewith. For this purpose the extreme ends of said pipes are peened over as designated at 42 to form a shoulder abutting against the inner surface of wall 20 of the radiator. Rings 43 encircling the pipes upon the exterior of the radiator may be pressed or driven against the wall of the radiator to securely clamp the pipes to the radiator. If desired, these rings may be threaded on the pipes to prevent movement thereof. With the pipes so attached, the joints between the various parts may be soldered, welded or brazed as desired to rigidly and tightly connect the parts together. Although I have shown the pipes 40 and 41 as arranged to receive flexible hose for connecting the heating fluid to the radiator. it can be readily comprehended that any suitable type of pipe connections such as screwed on compression fittings may be employed and used in place of the pipes 40 and 41.

For the purpose of relieving the strain upon the two pipes 40 and 41, I have provided two sleeves 44 and 45 which are attached to the back 24 and through which the said pipes extend. These sleeves have bores of slightly larger diameter than the pipes 40 and 41 and which are lined with tubular gaskets 46 adapted to yieldingly support the inlet and outlet pipes of the radiator. The sleeves 44 and 45 are formed with shoulders 47 which abut against the inner surface of the back 24 and said sleeves are preferably welded or soldered to the shell 11 in a manner similar to the pipes 40 and 41. The two sleeves 44 and 45 are externally threaded as designated 7 the entire heater and particularly the sleeves 44 and 45 which support the pipes 40 and 41, a stifiening member 52 is employed, which is constructed from a plate of sheet metal stamped and bent as best shown in Figs. 2 and 3. This stiffening member is constructed with two arms 54 and 55, which are provided with openings 56 and 53, adapted to receive the two sleeves 44 and 45. The plate 52 is further constructed with two legs 57 and 58, whichterminate in feet 59 and 60, arranged to bear against the rear surface of the back 24 of shell 11. The arms 54 and are clamped between the nuts 49 and 50, which serve to tie the stifiening member 52 to the radiator structure and which also serve toplace suflicient pressure upon the feet 59 and 60 so thatthe desired degree of rigidity is procured.

The two passageways 37 and 38, between-the radiator 10 and the shell 11, serve to conduct the air to be heated longitudinally along the outer cylindrical wall 19 of the radiator and radially inwardly along the radial wall 20 thereof. In con-' junction with these passageways, another passageway 57 is utilized, which is formed through a tubular member 58, disposed within the compartment 12 of the radiator and attached to the back 24 of shell 11. This tube is spaced from the wall 18 of the radiator to form the passageway 57, which is in direct communication with the radial passageway 38. For the purpose of attaching the tube 58 to the back 24, said tube is constructed with a number of tongues 159 which extend through suitable openings 160 in said back and which are bent over and upon the outer surfaces of the back to clinch the same and hold the said tube firmly mounted in place within the radiator structure. Both the passageways 37 and 57 are open at the forward portions of the radiator. To increase radiation, two corrugated radiating fins 260 and 61 may be employed, which erably a blower, though any other similar device may be utilized, such as a fan or the like. The blower 14 consists of a case 62, which is constructed in two halves 63 and 64, formed of sheet metal pressed into the desired shape. These halves are formed with turned over edges 65 along the medial plane thereof, which may be soldered or welded together, the same as the radiator structure. The case 63 is spiraled in form as best shown in Fig. 1 and terminates in a discharge outlet 66. The inlet of the fan is indicated at 67 and consists of an opening in the side of the half 64 of the case. Surrounding this opening is a lip 72 which is used to support the blower. In conjunction therewith a bell or hood 68 is employed, which is directly attached to the wall 17 of the radiator 10 by means of a number of screws 69. These screws are threaded into lugs 70 which are riveted and soldered to the saidan outwardly extending flange' 71 encircling an opening 167 in said bell. The lip 72 is rotatably mounted upon this flange so' that the openings 6'7 and 167 are in register. By turning the entire case 62 on the lip 72, the discharge outlet 66 of case 62 may be turned in any direction so as to discharge the heated air into any portion of the vehicle in which the heater is disposed.

If desired, the heater may be mounted on the dash 27 of the motor vehicle without cutting a hole as large as the hole 140. In such case, two smaller holes are cut to receive the pipes 40 and 41 and the heater mounted on the dash through the nuts 50 and 51 which are disposed one on each side thereof.

The motor 13, for operating the blower 14, is disposed within the compartment 12 within the radiator structure. This motor may be of any ordinary design and may consist of a body 73, formed with the usual end bells 74 and 75, which are provided with bearings 76 and 77, for journaling the usual armature shaft 78. The construction of the motor 13, forming no particular feature of this invention, will not be further described. The motor 13 is mounted in the radiator structure as follows: At the center of the back 24 of the shell 11 is formed an inwardly turned flange 178, which has an opening 79 therethrough of a diameter just sufiicient to snugly receive the bearing 77. The metal of the back 24 in proximity to this opening is constructed with a number of radial slits 80, which form the flange 178 with fingers 81 having sufficient resiliency to grip the bearing 77 and hold the one end of the motor supported thereby. On the other end of the motor are provided two angles 82 and 83, which may be secured to the body 73 in any suitable manner. These angles are formed with legs 84, which extend outwardly from the body 73 in diametrically opposite directions. The two legs 84 are threaded to receive two machine screws 85 and 86, which pass through two lugs 88, struck out of the metal of the tube 58 and bent inwardly in a radial direction at diametrically opposite portions of the tube 5.8. By means of these lugs and the angles 82 and 83, the forward end of the motor is rigidly held supported while the rear end is held in place through the bearing 77 which is disposed within the flange 78 of back 24. For the purpose of leading the wires for motor 13 away from the heater, an insulating bushing 165 is employed, which is mounted in the back 24 of shell 11.

Within the case 62 is positioned a rotor 89 which is constructed with a ring-like portion 90 and a disk-like portion 91, having disposed between the same, a plurality of blades 92, best shown in detail in Figs. 1 and 2. The disk-like portion 91 is provided at the center thereof with a bored boss 93 which is tapped to receive a set screw 94 through which the rotor may be keyed to the shaft 78 of motor 13. As the motor 18 rotates, the rotor 89 is correspondingly rotated, and air drawn successively through the passageways 37, 38, 157, the inlet 67 and into the rotor 89, from which the same is discharged by centrifugal force into the case 62 and delivered through the outlet 66. As the air passes along the passageway 37, a certain amount of heat is delivered to it from the radiator 10, with which it comes in direct contact and also from the fins 260, disposed within the same. The air is further heated through the walls 20 and 18 of the radiator and through the fins 61 in passageway 157 as the air passes about the radiator structure. In

this manner, a maximum amount of heat is delivered to the air. The air, on leaving the blower 14 is directed in a direction at right angles to the direction of travel of the incoming air, so that short circuiting of the air through the heater is prevented. At the same time, the air leaving the outlet 66, travels with a considerably greater velocity than the incoming air due to the relative areas of the heater inlet and outlet so that the same may be readily directed to the locality desired and so that short circuiting is further prevented.

My improved heater is readily taken apart for inspection and repairs which may be accomplished as follows: The lip 72 of the blower 14' fits snugly over the flange 71 so that the same may be frictionally held attached thereto. The opening 67 through the lip. 72 is greater in diameter than the external diameter of the rotor 89 which permits of removing the case from the heater while the rotor 89 is mounted on the motor 13. The bell 68 may be removed by unscrewing the various screws 69. Motor 13 is removed by unscrewing screws 85 and 86 and bygiving the motor a part turn to free the legs 84 from the lugs 88. Such movement permits of the withdrawal of the motor with rotor attached directly out of the compartment 12, so that the motor may be inspected and oiled through the oil cups 138 thereof.

The form of my invention shown in Figs. 1 to 4 inclusive may be used with any suitable heating fluid where the various joints of the radiator and pipe connections are brazed or welded. The heater may be heated either by the hot water from the radiator of the engine or by the exhaust gases of the engine. Where however, the joints are soldered with soft solder, the device can only be heated through the cooling liquid of the engine.

If desired, the entire heater may be mounted on the dash of the vehicle through the bolts 29, 30, 31 and 32 instead of the flange 26 or the sleeves 44 and 45. In such case, the shanks 34 of these bolts are constructed considerably longer than shown in Fig. 2 as indicated in Fig. 4. The dash 180, in such case, is provided with openings 181, which receive-the shanks 34 of the various bolts. Upon these shanks and between the dash 180. and the nuts 39 are positioned sleeves 182 which hold the device properly spaced from the dash. Nuts 183 are screwed upon the extreme ends of the shanks 34 of said bolts to clamp the heater to the dash.

In Figs. 5 and 6, I have shown a slightly different form of heater which will now be described in detail:

This heater, similar to the heater previously described, comprises a toroidal radiator 95, formed with a central compartment 96, which has disposed within it a motor 97, similar to or identical with, the motor 13 which operates air impelling means 98. In this case, the air impelling means has been illustrated as a fan in-' steadof a blower. These parts will now be described in detail:

The radiator 95 consists of two annular headers 99 and 100 and a core structure 101, disposed between the same. The headers 99 and 100 may be constructed of sheet metal formed in two halves 105 and 106, which may be pressed in the desired shape with the edges thereof abutting one another. The core structure 101 consists of a plurality of tubes 102, which extend between the two headers 99 and 100 and which are in communication therewith. A number of fins 103 are secured upon the tubes 102 in spaced relation from each other and serve to assist in conveying heat from the radiator to the air passing through the same. An inlet pipe 203 is connected to the upper portion of the header 100 of the radiator, while an outlet pipe 104 is connected to the lower portion of the header 99 and extends through the core 101 and also through a sleeve 205 in the header 100. All of the parts of the radiator, including both of the headers 99 and 100 and the core structure 101 are secured together by soldering or brazing to form a unitary fluid tight structure for the conducting of the heating fluid through the same.

For the purpose of mounting this type of heater upon the dash of the vehicle, the two pipes 203 and 104 are utilized. These pipes are externally threaded as designated at 107 and 108, to receive four nuts 109, 110, 111 and 112. The dash, which is designated by the numeral 113, is formed with two openings 214 and 215 through which the two pipes 203 and 104 extend. By means of the nuts 109, 110, 111, and 112, one of each of which is positioned on each side of the dash 113, the entire radiator structure may be rigidly secured to the dash to support the same in its desired position. The heating medium may be conducted to and from the two pipes 203 and 104by any suitable means such as flexible hose or pipes, connected to the cooling system of the engine and to the pipes 203 and 104 by suitable fittings.

The motor 97 of the heater shown in Figs. 5 and 6 may be exactly the same as the motor 13, shown in Fig. 1 and may be constructed with a body 114, having end bells 115 and 116 and provided with bearings 117 and 118, journaling its armature shaft 119. For supporting the motor 97, an end plate 120 is employed, which may be soldered or otherwise secured to the rear side of the radiator header 100. This end plate is constructed with an inwardly turned flange 121, similar to the flange 98, which is slit as designated at 122, to form fingers 123 adapted to grip and support the inner end of the motor 97 through its bearing 117. The motor is further supported through two angles 124 and 125, which are similar to the angles 82 and 83, excepting that said angles extend outwardly beyond the motor proper as illustrated. These angles are bolted to two ears 126, which may be soldered or otherwise attached to the forward face of the radiator header 99. A number of bolts 127 pass through the angles 124 and through the ears 126, which extend inwardly from the inner surface of the radiator proper.

Upon the armature shaft 119 of motor 97 is mounted a fan 129 which causes the circulation of air radially inwardly through the radiator core 101 and along the fins 103. The air on passing through the radiator core enters the compartment 96 where the same travels longitudinally'through the space between the motor 9'7 and the inner surface of the radiator structure, which I have designated by the reference numeral 130, where the same is directed outwardly by the fan The fan 129 may be encased within a case 131, consisting of an outer shell 132 attached to the radiator header 99 through an annular ring 133. The ring 133 is permanently secured to the header 99, while the case 131 may be detachably mounted on said ring through screws 134. The shell 131 is formed with an inwardly turned lip 137, which is open at the forward portion thereof as indicated at 135, which opening may be covered by a screen 136. This screen serves to protect the fan and prevent the entrance of objects into the fan casing which might interfere with the operation of the device.

The form of the invention shown in Figs. 5 and 6 is equally as easily taken apart as the other form of the invention. In order to remove the motor and fan, it is merely necessary to unscrew the screws 134 which permits of removing the fan case 98. Upon removal thereof, unscrewing of the screws or bolts 127 permits of the removal of the motor 97 from the compartment 96, after which the same may be inspected and lubricated as brought out in conjunction with the other form of the invention.

My invention is highly advantageous in that an extremely sturdy and rigid radiator structure is provided. The heater may be constructed at an economical cost, and the parts may be so built as to give the heater a considerably longer life than is possible with the heaters generally used for the purpose. The heateris extremely compact and occupies a minimum amount of space, so as not to interfere with the-comfortable seating of the occupants of the motor vehicle when installed within the cab thereof. The form of the invention shown in Figs. 1 to 4 may be so mounted that only a small part of the heater extends into the cab proper. The parts of the heater are readily removed to permit of inspection and oiling and the parts can be readily replaced when wear occurs. Due to the construction of the heater, the air enters in a direction at right angles to the direction of travel of the discharged air, so that short circuiting of the air through the heater is prevented. By means of the particular construction employed, the heater may be used either as an exhaust heater or a hot water heater without reconstruction, thereby renderingthe heater adaptable for all types and styles of motor vehicles.

Changes in the specific form of my invention as. herein disclosed may be made within the scope of what is claimed, without departing from the spirit of my invention.

Having described my invention, what I claim as new and desire to protect by Letters Patent is:

1. K heater comprising a toroidal radiator structure having a central compartment and providing an air circulating passageway extending both radially and longitudinally along said radiator, a motor within said compartment and means for impelling the flow of air operated by said motor for causing the circulation of air radially inwardly and thereafter longitudinally outwardly along said passageway.

2. A heater comprising a toroidal radiator structure having a central compartment and providing an air circulating passageway of defined extent extending radially and longitudinally along said radiator, a motor within said compartment and means for impelling the flow of air carried by said motor 'and projecting outwardly beyond said radiator structure at one end of said compartment for causing the circulation of air radially inwardly and longitudinally outwardly along said passageway.

a 3. A heater comprising a toroidal radiator structure, having a central compartment;-a motor within said compartment, said radiator structure providing a radial air passagewayand an annular passageway encircling said motor the one discharging into the other, and air impelling means operated by said motor for causing the circulation of air along said radial and annular passageways.

4. A heater comprising a toroidal radiator having a central compartment, a shell enclosing said radiator, provided with a sleeve encircling said radiator and spaced therefrom and a back spaced from said radiator to provide an outer annular passageway and a radial passageway communicating therewith. a sleeve within said compartment spaced from the radiator to provide an inner annular passageway communicating with said radial passageway, a motor within said sleeve and means for impelling the flow of air operated by said motor and communicating with said inner annular passageway for causing the flow of air through said passageways. 5. A heater comprising a toroidal radiator having a central compartment, a shell encasing said radiator and having a sleeve encircling said radiator and spaced therefrom to provide an outer annular passageway and having a back spaced from said radiator to provide a radial passageway, a motor within said compartment, spaced from the walls thereof, means upon the exterior of said radiator operated by said motor for impelling the flow of air through said outer annular passageway along said radial passageway and through the space between said motor and radiator.

6. A heater comprising a shell, having a sleeve and a back, a radiator within said shell, spaced from said sleeve and back, a motor, means for impelling the flow of air operated by said motor and communicating with the space between said back and radiator for impelling the flow of air along the space between said shell and radiator.

7. A neater comprising a radiator structure having a central compartment and provided with a back, an electric motor within said compartment formed with circular bearings, said back having a central opening therein for the reception of one of said bearings and means for supporting the other end of the motor from another portion of said radiator structure.

8. A heater comprising a radiator structure having a central compartment and provided with a back, an electric motor within said compartment formed with a body and having circular bearings, said back having a central opening therein for the reception of one of said bearings and legs issuing outwardly from the body of said motor and attachable to other portions of said radiator structure for supporting the other end of said motor.

9. A heater comprising a toroidal radiator having a central compartment, a motor within said "compartment spaced from said' radiator to i provide an annular passageway, a bell mounted on said radiator and having a central opening surrounded by an outwardly extending flange, a blower case rotatably mounted upon said flange with its inlet registering with said opening and a blower rotor disposed within said casing and driven by said motor for impelling the flow of air along said passageway through the opening in said bell and into said case.

10. A heater comprising a radiator having an air passageway, a member connected to said radiator and provided with an opening serving as an outlet for said passageway, said member being provided with an outwardly extending circular flange, a blower case having an inlet and an outlet, said inlet being of a diameter sufiicient to receive said ,fiange, said case having a lip encircling said inlet and engaging said flange and serving to support said case on said flange, a blower rotor within said case and means for rotating said rotor.

11. A heater comprising a shell, a radiator within said shell and spaced therefrom, said radiator having a heating fluid passageway, inlet and outlet pipes connected to said radiator and communicating with said passageway, said pipes extending through said shell and sleeves attached to said shell and encircling said pipes for relieving the strain thereon.

12. A heater comprising a shell, a radiator within said shell and spaced therefrom, said radiator having a heating fluid passageway, inlet and outlet pipes connected to said radiator and communicating with said passageway, said pipes extending through said shell, sleeves attached to said shell and encircling said pipes for relieving the strain thereon and a tie member connecting said sleeves for stiffening and reinforcing the same.

13. A heater comprising a shell, a radiator within said shell and spaced therefrom, said radiator having a heating fluid passageway, inlet and outlet pipes connected to said radiator and communicating with said passageway, said pipes extending through said shell, sleeves attached to said shell and encircling said pipes for relieving the strain thereon, a tie member connecting said sleeves for stiff ngand reinforcing the same, said tie member engaging said shell for retaining the spacing of said tie member and means on said sleeves for urging said tie member toward said shell.

14. A heater comprising a radiator, a shell encircling said radiator and spaced therefrom to form an air circulating passageway therebetween, said shell having a back spaced from the radiator, bolts extending through the back of the shell and attached to said shell and to said radiator for holding the shell in spaced relation to the radiator, said bolts extending outwardly beyond the shell and forming attaching means for mounting the heater upon the dash board of a motor vehicle.

15. A heater comprising a radiator, an inner annular sleeve spaced therefrom to form an air passageway therebetween, a motor within said sleeve and spaced along its outer periphery from said sleeve, and supporting nieans at one end of said motor and sleeve and extending between said tire circumferential area thereof.

plate.

16. A heater comprising a toroidal shaped radiator, an annular shell encircling said radiator and forming therewith an air circulating passageway, an end member connected to said shell, and a number of spacers connected to said end member and to the end of the radiator for holding said shell spaced from the radiator.

I 17. A heater comprising a radiator having an air passageway, a member connected to said radiator and provided with an opening serving as an outlet for said passageway, said member being provided with an outwardly extending circular flange, a blower case having an inlet and an outlet, said inlet being of substantially the same diameter as said flange, said case having a lip encircling said inlet'and engaging said flange and serving to support said case through said flange, a blower rotor within said case and means for rotating the rotor.

18. A ,heater comprising a toroidal radiator structure, means forming in conjunction therewith an annular air passageway, an end plate spaced from said radiator structure, said passageway discharging the air flowing therethrough against said plate, said plate being in heat conducting relation with respect to said radiator structure, and means for impelling the flow of air through said passageway and against said 19. A heater comprising a radiator structure formed with a heating fluid circulating passageway, inlet and outlet pipes communicating with said passageway and spaced from one another a tie member constructed of sheet metal and secured to said pipes at localities remote from said radiator siructure, and legs bent outwardly from ture and the other of the arms of said cross having parts extending toward said radiator structure and engaging the same for reinforcing said radiator structure and tie member.

IRVING E. ASKE. 

